/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
namespace System.Qizx.Util
{
	
	/// <summary> Matches the strings that start with a given prefix.</summary>
	public class PrefixPattern:StringPattern
	{
		public PrefixPattern(char[] pattern, int length):base(pattern, length)
		{
		}
		
		public PrefixPattern(string pattern):this(pattern.ToCharArray(), pattern.Length)
		{
		}
		
		public override int match(char[] string_Renamed)
		{
			int plen = _pattern.Length;
			for (int i = 0, len = System.Math.Min(plen, string_Renamed.Length); i < len; i++)
			{
				int diff = string_Renamed[i] - _pattern[i];
				if (diff > 0)
					return BEYOND;
				if (diff != 0)
					return NOMATCH;
			}
			return (string_Renamed.Length < plen)?NOMATCH:MATCH;
		}
		
		public override bool matches(char[] string_Renamed)
		{
			// boost by checking length:
			if (string_Renamed.Length < _pattern.Length)
				return false;
			return match(string_Renamed) == MATCH;
		}
	}
}